The European Union has proposed extending the Carbon Border Adjustment Mechanism (CBAM) to additional downstream goods from 1 January 2028. The proposal would cover a defined group of manufactured products containing significant amounts of steel and aluminium. Fasteners, wire products, springs and related fabricated-metal goods are listed among the categories central to the downstream expansion debate.
EU institutions have not yet agreed on the final product scope. The European Commission’s proposal is being negotiated with positions set by the Council and the European Parliament. Parliament supports a substantially larger list of downstream products than the Commission proposal.
Negotiations and how proposed rules differ from current import requirements
The final CBAM scope remains under negotiation, so individual Combined Nomenclature (CN) codes should not be treated as definitively covered until amending legislation is adopted. Companies are also expected to distinguish between the existing legal framework for 2026 imports and potential requirements under the proposed reform. The Commission proposal and the Council and Parliament positions can be used for scenario analysis and future contract drafting.
Those documents should not be applied to current declarations as if the 2028 extension were already in force. A two-scenario planning model is described as a way to prepare for both the current rules and a possible expansion. This approach supports building data-collection systems and optional contractual provisions without basing present compliance decisions on legislation that remains unsettled.
Downstream compliance relies on precursor data and traceability
If additional manufactured products enter CBAM under the downstream expansion, fastener, wire and spring producers would need to link their steel inputs to finished goods exported to the EU. Bills of materials, production yields and manufacturing records would be used to show how precursor consumption relates to the finished product’s CN classification. This would connect input quantities to product categorisation for CBAM purposes.
Suppliers would have to provide emissions information required for covered precursors. Where materials from multiple sources are combined, manufacturers would need a defensible method for averaging or segregating emissions data that complies with the final applicable rules. The compliance obligations for downstream manufacturers would differ from those of steel mills.
A fastener or spring producer may have relatively modest direct emissions, while much of embedded carbon could originate in steel rod, wire or other incoming materials. As a result, supplier emissions data, material traceability and accurate product classification could become more important than tracking combustion sources within the downstream factory. The focus would shift toward upstream input documentation tied to exported product classifications.
Verified precursor emissions versus default values
An extension of CBAM to downstream goods could influence sourcing decisions across European industrial supply chains. EU buyers may prefer suppliers that provide verified precursor emissions data and more predictable information about potential CBAM costs. Manufacturers relying on inputs with limited emissions documentation could face disadvantages where applicable default values lead to less favourable results.
The differences could be relevant for high-volume, low-margin products such as fasteners, where small changes in embedded emissions can affect commercial calculations. Under the definitive regime described in the proposal framework, default-value mark-ups increase through the phase. Reliable actual data may reflect characteristics of cleaner feedstock or production.
Suppliers able to quantify resulting cost differences in euros may be better positioned for pricing discussions and long-term supply agreements than businesses relying on general low-carbon claims. The commercial outcome would depend on final legislation and calculation rules. Until those are established, companies are expected to treat potential cost differences as scenarios rather than confirmed liabilities.
Preparation timelines in Serbia, Bosnia and Herzegovina, and North Macedonia
Serbia, Bosnia and Herzegovina, and North Macedonia have metal-processing sectors supplying European automotive, construction and machinery customers. Manufacturers in these markets are advised to monitor the proposed 2028 extension because preparing supplier data, product classifications and production records may require substantial lead time. Supplier governance is expected to remain part of monitoring, reporting and verification (MRV).
Purchase contracts should specify details including the producing installation, reporting period, emissions-data format, verification requirements and procedures for correcting information. Changes at supplier level—such as production site updates, manufacturing route changes or precursor changes—can alter emissions values associated with products. If such changes are not communicated before commercial terms are agreed, downstream manufacturers could face unexpected differences in eventual CBAM exposure.
CN-code screening and integration with existing records
Manufacturers are expected to screen export CN codes against product lists contained in the Commission proposal and negotiating positions of the Council and Parliament. This can help identify products with a higher likelihood of inclusion and prioritise collection of precursor emissions data. The stated objective is preparation for possible legislative changes without treating proposed categories as covered under current law.
Companies are expected to integrate preparation with existing purchasing, production, customs and finance records. A decision file is described as connecting relevant CN code information with precursor details, production-process boundaries, material records and emissions information. It should also identify responsibility for approving assumptions and documenting fallback treatments where preferred data cannot be substantiated.
Using underlying records for both operational management and compliance preparation is described as supporting adaptation when final product lists, calculation methodology or other legal requirements are established. It is also presented as providing a basis for supplier negotiations and future cost assessments within supply chains affected by potential CBAM downstream coverage.